Colistin Sulfate USP from Mexico
Colistin sulfate (polymyxin E) is a last-resort antibiotic for multi-drug resistant Gram-negative infections. Bulk API powder imports under HTS 2941.90.50.00 as other antibiotics. Qualifies as pure chemically defined compound under Chapter 29 notes.
Duty Rate — Mexico → United States
100%
Rate breakdown
9903.04.60100%Except as provided in heading 9903.04.61, patented pharmaceutical articles as provided for in subdivisions (c) and (d) of U.S. note 40 to this subchapter
9903.05.860%Articles provided for in subdivision (b) of U.S. note 52 to this subchapter
Import Tips
• Nephrotoxicity profile and batch potency testing mandatory
• EU vs USP monograph differences require harmonized CoA
• Critical drug status accelerates FDA review but heightens scrutiny